diff options
Diffstat (limited to 'TAO/orbsvcs/orbsvcs/Event/EC_Conjunction_Filter.h')
-rw-r--r-- | TAO/orbsvcs/orbsvcs/Event/EC_Conjunction_Filter.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/TAO/orbsvcs/orbsvcs/Event/EC_Conjunction_Filter.h b/TAO/orbsvcs/orbsvcs/Event/EC_Conjunction_Filter.h new file mode 100644 index 00000000000..e50d6b37867 --- /dev/null +++ b/TAO/orbsvcs/orbsvcs/Event/EC_Conjunction_Filter.h @@ -0,0 +1,113 @@ +// -*- C++ -*- + +/** + * @file EC_Conjunction_Filter.h + * + * $Id$ + * + * @author Carlos O'Ryan (coryan@cs.wustl.edu) + * + * Based on previous work by Tim Harrison (harrison@cs.wustl.edu) and + * other members of the DOC group. More details can be found in: + * + * http://doc.ece.uci.edu/~coryan/EC/index.html + */ + +#ifndef TAO_EC_CONJUNCTION_FILTER_H +#define TAO_EC_CONJUNCTION_FILTER_H +#include /**/ "ace/pre.h" + +#include "orbsvcs/Event/EC_Filter.h" +#include /**/ "orbsvcs/Event/event_serv_export.h" + +#if !defined (ACE_LACKS_PRAGMA_ONCE) +# pragma once +#endif /* ACE_LACKS_PRAGMA_ONCE */ + +TAO_BEGIN_VERSIONED_NAMESPACE_DECL + +/** + * @class TAO_EC_Conjunction_Filter + * + * @brief The conjunction filter. + * + * This filter waits until each one of its children has accepted + * at least one event. Only in that case it accepts and publishes + * the sequence formed by all the children events. + * + * <H2>Memory Management</H2> + * It assumes ownership of the children. + */ +class TAO_RTEvent_Serv_Export TAO_EC_Conjunction_Filter : public TAO_EC_Filter +{ +public: + /// Constructor. It assumes ownership of both the array and the + /// children. + TAO_EC_Conjunction_Filter (TAO_EC_Filter* children[], + size_t n); + + /// Destructor + virtual ~TAO_EC_Conjunction_Filter (void); + + // = The TAO_EC_Filter methods, please check the documentation in + // TAO_EC_Filter. + virtual ChildrenIterator begin (void) const; + virtual ChildrenIterator end (void) const; + virtual int size (void) const; + virtual int filter (const RtecEventComm::EventSet& event, + TAO_EC_QOS_Info& qos_info + ACE_ENV_ARG_DECL); + virtual int filter_nocopy (RtecEventComm::EventSet& event, + TAO_EC_QOS_Info& qos_info + ACE_ENV_ARG_DECL); + virtual void push (const RtecEventComm::EventSet& event, + TAO_EC_QOS_Info& qos_info + ACE_ENV_ARG_DECL); + virtual void push_nocopy (RtecEventComm::EventSet& event, + TAO_EC_QOS_Info& qos_info + ACE_ENV_ARG_DECL); + virtual void clear (void); + virtual CORBA::ULong max_event_size (void) const; + virtual int can_match (const RtecEventComm::EventHeader& header) const; + virtual int add_dependencies (const RtecEventComm::EventHeader& header, + const TAO_EC_QOS_Info &qos_info + ACE_ENV_ARG_DECL); + + typedef unsigned int Word; + +private: + /// Determine if all the children have received their events. + int all_received (void) const; + + TAO_EC_Conjunction_Filter (const TAO_EC_Conjunction_Filter&); + TAO_EC_Conjunction_Filter& operator= (const TAO_EC_Conjunction_Filter&); + +private: + /// The children + TAO_EC_Filter** children_; + + /// The number of children. + size_t n_; + + /// The event we send up (once all the children have pushed theirs). + RtecEventComm::EventSet event_; + + /** + * The number of words in the bit vector + */ + size_t nwords_; + + /** + * The bit vector to keep track of the children that have received + * their events. + */ + Word* bitvec_; + + /// The current child in the iteration, used in the push() method... + ChildrenIterator current_child_; +}; + +TAO_END_VERSIONED_NAMESPACE_DECL + +#include /**/ "ace/post.h" +#endif /* TAO_EC_CONJUNCTION_FILTER_H */ |